The Strike Chain System is the replacement for the Killstreak system in Call of Duty: Modern Warfare 3. In this system, killstreaks have been replaced by pointstreaks, and the term "Strike Chain" describes any chain of three pointstreaks.
In previous Call of Duty games, players were able to choose up to three different killstreak rewards, and were awarded them after killing a certain number of enemies in a row without dying. Those killstreaks were independent of the player's custom classes. In the Strike Chain system, however, killstreaks have been replaced by Pointstreaks, which are awarded to players for accumulating a certain number of points. Another difference from past reward systems is points being gained not only by killing opponents, but also for shooting down air support, and completing objectives, such as capturing a position in Domination.
Pointstreaks are divided into three Strike Packages - Assault, Support, and Specialist. Strike Packages are attached to custom classes, and a Strike Chain can only be formed from pointstreaks from the same Strike Package.
- Main article: Assault Strike Package
The Assault Strike Package includes pointstreak rewards more suited to inflicting damage on opposing players. When using this strike package, kills acquired through pointstreaks give points toward newer pointstreaks, and all accumulated points are reset when the player reaches their last pointstreak, or when the player is killed.
|Points Required||Pointstreak Reward||Description|
|3 (2 with Hardline)||UAV||Deploy an unmanned aerial surveillance drone to pinpoint enemy position on the map as red dots for 30 seconds. Three of these drones active at once acts as the Advanced UAV from the Support Strike Package.|
|4 (3 with Hardline)||Care Package||Call in a Care Package drop that offers a random killstreak reward that will be only of the Assault killstreaks. It will not offer any Support killstreak rewards.|
|5 (4 with Hardline)||I.M.S.||Deploy an anti-personnel Intelligence Munition System. Anybody in proximity of the blast, triggered by nearby enemy movement, gets blown to bits in an instant.|
|5 (4 with Hardline)||Predator Missile||Call in a Hellfire Predator Missile that will target a spot on the map. Can be destroyed with the Trophy System or the EMP killstreak while in mid air. It can destroy enemy killstreaks like the Reaper and AC-130, but extreme precision must be used to do so.|
|5 (4 with Hardline)||Sentry Gun||Call in a crate drop containing an automated tripod turret that guns down anyone not using Blind Eye within a close proximity.|
|6 (5 with Hardline)||Precision Airstrike||Call in a deadly airstrike of a series of three bombing aircraft for instant explosive support across the designated area. Can only be destroyed by the EMP killstreak.|
|7 (6 with Hardline)||Attack Helicopter||An Attack Helicopter enters the airspace and immediately starts picking off enemies in the open. Very easy to shoot down but can rack up a lot of points and is best used to stack killstreaks.|
|9 (8 with Hardline)||Strafe Run||Call in 5 Attack Helicopters to sweep the indicated area with massive firepower. The Strafe Run will make the sweep through the area twice. Useful on open maps.|
|9 (8 with Hardline)||AH-6 Overwatch||The AH-6 flies in and provides personal protection, tailing your movements and opening fire on targets in the open. Enemies with Blind Eye will remain undetected by the AH-6.|
|9 (8 with Hardline)||Reaper||Control a Reaper UAV from a laptop that carries fourteen AGMs (Air to Ground Missiles) that you can guide via lazer sight on the Reaper drone. Active for 45 seconds, until all 14 AGMs are used or until shot down, whichever is sooner. Carries one set of flares for protection against enemy missiles. Can destroy enemy killstreaks.|
|10 (9 with Hardline)||Assault Drone||Call in a Assault Drone by airdrop that carries a machine gun and a grenade launcher on it. The grenades replenish automatically after a short duration of time. Active for about a minute or until destroyed, whichever is sooner. Can be destroyed by any missile launcher.|
|12 (11 with Hardline)||AC-130||Be the gunner of a Lockheed AC-130 "Angel of Death" Aircraft and have access to three gun cannons that rain massive firepower on your enemies below. Carries two sets of flares for protection against enemy missiles. The AC-130 takes no gunfire damage from enemies so it can only be destroyed by the EMP killstreak, SAM Turrets, SMAW, Javelin, Predator Missile or Stinger launchers. Can also destroy enemy killstreaks.|
|12 (11 with Hardline)||Pave Low||A heavily armoured attack helicopter enters the battlefield and attacks enemies in the open. Enemies not using Blind Eye that attack the Pave Low will be targeted by the helicopter instantly.|
|15 (14 with Hardline)||Juggernaut||Call in a heavy duty EOD suit, equipped with the M60E4 and MP412. Unlike the support variant, it does not have a Portable Radar equipped.|
|17 (16 with Hardline)||Osprey Gunner||Get behind the guns of a V-22 Osprey that you control as you deliver and defend three care packages for your teammates. Carries two sets of flares for protection against enemy missiles.|
- Main article: Support Strike Package
The Support Strike Package includes pointstreak rewards more suited to assisting the player's team. When using this strike package, kills acquired through pointstreaks do NOT give points toward newer pointstreaks, and all accumulated points are ONLY reset when the player reaches their last pointstreak; not upon death.
|Points Required||Pointstreak Reward||Description|
|4 (3 with Hardline)||UAV||Deploy an aerial surveillance drone to pinpoint enemy position on the map.|
|5 (4 with Hardline)||Counter-UAV||Take away the enemy's ability to track your team via radar.|
|5 (4 with Hardline)||Ballistic Vests||Deploy a load of Ballastic Vests for increased armour and damage resistance.|
|5 (4 with Hardline)||Airdrop Trap||Aerial support drops in a rigged crate, blasting away the first enemy to open its contents.|
|8 (7 with Hardline)||SAM Turret||Deploy the SAM Turret to lock down air space in the vicinity, knocking out any enemy killstreaks above, aside from the Stealth Bomber.|
|10 (9 with Hardline)||Recon Drone||Deploy and take the controls of a miniature Recon Drone, possessing the ability to mark enemy positions and incapacitate them.|
|12 (11 with Hardline)||Advanced UAV||Reveal both the position of the enemy as well as the direction they're facing for a brief period of time.|
|12 (11 with Hardline)||Remote Sentry||Deploy and manually control a Remote Sentry.|
|14 (13 with Hardline)||Stealth Bomber||Call in a precision airstrike without giving notice to the enemy team.|
|18 (17 with Hardline)||EMP||Temporarily disable enemy equipment and HUDs throughout the map for a limited time.|
|18 (17 with Hardline)||Juggernaut Recon||Call in a heavy duty EOD suit, equipped with the Riot Shield and USP .45 for extreme damage resistance.|
|18 (17 with Hardline)||Escort Airdrop||
An Osprey enters the target vicinity and drops a load of five Care Packages, sticking around for a brief period of time to attack enemies that try to steal the goods.
- Main article: Specialist Strike Package
In the Specialist Strike Package, players choose perks to be awarded instead of pointstreaks. When using this strike package, the perks are given to the player at 2, 4, and 6 points, or 1, 3, and 5 with Hardline. The player may place any additional perk (excluding Overkill) at any place in their Strike Chain. In addition, if the player reaches 8 points, or 7 with Hardline, they are awarded every remaining perk in the game, again excluding Overkill. Every applicable proficiency for any weapon the player is using will be awarded to one (besides Damage, Breath, or Attachments, unless already equipped). All benefits are lost on death.
- Main article: M.O.A.B.
The M.O.A.B.(Massive Ordinance Air Burst/Mother Of All Bombs) is a hidden pointstreak reward obtainable with any strike package. Obtaining it requires 25 kills in one life (24 with Hardline). Once called in, there is a ten second countdown, after which it kills every enemy player in the open when it hits, destroys all killstreaks on the enemy team or in FFA all enemy killstreaks in the Air or Ground minus the Airdrop Trap and causes an EMP effect for the opposing team for one minute. The team, or the player in Free for All, that deployed it also gains double XP for the rest of the match. The M.O.A.B. is the spiritual successor to the Tactical Nuke. However, unlike the Tactical Nuke, the M.O.A.B. will not end the game. It should be noted that the M.O.A.B. can only be acquired with direct kills from the player, not by shooting down air support, completing objectives, or getting other kills with other pointstreak rewards. Note that the EMP killsteak from the Support Strike Package cannot destroy this killstreak after it has been called in, but only prevent it from being called in.